GEORGE MASON UNIVERSITY
Title: "Structural Ordering and Vitrification of Multicomponent Metallic liquids". The proposed project aims to use computational techniques, coupled with synchrotron x-ray scattering experiments, to reveal the details of atomic-level structural evolution in multicomponent metallic liquids, and to advance our understanding of the structural underpinnings of the vitrification process of supercooled metallic liquids.
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| AWARD OVERVIEW |
| Award Number |
0907325 |
Funding Agency |
National Science Foundation |
| Total Award Amount |
$315,000 |
Project Location - City |
Fairfax |
| Award Date |
08/05/2009 |
Project Location - State |
VA |
| Project Status |
More than 50% Completed |
Project Location - Zip |
22030-4444
|
| Jobs Reported |
0.00 |
Congressional District |
11 |
| Project Location - Country |
US |
|
|
Recipient Information
(Grants)
| Recipient Information (Grants) |
|
Recipient Name
|
GEORGE MASON UNIVERSITY |
| Recipient DUNS Number |
077817450
|
| Recipient Address |
4400 UNIVERSITY DR |
| Recipient City |
FAIRFAX |
| Recipient State |
Virginia |
| Recipient Zip |
22030-4422 |
| Recipient Congressional District |
11 |
| Recipient Country |
USA |
Required to Report Top 5
Highly Compensated Officials |
No |
Projects and Jobs Information
| Projects and Jobs Information |
| Project Title |
Structural Ordering and Vitrification of Multicomponet Metallic Liquids |
| Project Status |
More than 50% Completed |
| Final Project Report Submitted |
No |
| Project Activities Description |
Science & Technology, General/Other |
| Quarterly Activities/Project Description |
During this research period, the PI has been implementing metadynamics to study the structural ordering of supercooled liquids. For classic molecular dynamics, even with the latest advances in computational technology, the cooling rate for the formation of metallic glasses is still limited within 10^8 K/s, which is a few orders of magnitude higher than what we observe in the experiment. Subsequently, a lot of new physics pertaining to slower cooling rates still remains largely unknown in computer simulation. To overcome this difficulty, a recent computational strategy, i.e., metadynamics, is particularly appealing. With this new computational method, we are able to sample much deeper energy basins of metallic glass formers, which can hardly be visited by classical molecular dynamics. Our focus is the structural and chemical evolution of local clusters of metallic glasses. We therefore set out to implement metadynamics in our computational code using local bond-orientational order parameter as collective variables. The computational code has been successfully implemented and applied to test the nucleation process of supercooled Al liquid and superheated Al crystals. A unifying mechanism is proposed to explain the superheating limit of crystals. More results on the structural ordering of supercooled liquids are expected to come around in the next research period. |
| Jobs Created |
0.00 |
| Description of Jobs Created |
No jobs to report this quarter |
Purchaser Information
(Grants)
| Purchaser Information |
| Contracting Office ID |
Not Reported |
| Contracting Office Name |
Not Available |
| Contracting Office Region |
Not Available |
| TAS Major Program |
49-0101 |
| Award Information |
| Award Date |
08/05/2009 |
| Award Number |
0907325 |
| Order Number |
|
| Award Type |
Grants |
| Funding Agency ID |
49 |
| Funding Agency Name |
National Science Foundation |
| Funding Office Name |
Not Available |
| Awarding Agency ID |
49 |
| Awarding Agency Name |
National Science Foundation |
| Amount of Award |
$315,000 |
| Funds Invoiced/Received |
$310,928 |
| Expenditure Amount |
$310,928 |
| Infrastructure Expenditure Amount |
$0 |
| Infrastructure Purpose and Rationale |
Not Reported |
| Infrastructure Point of Contact Name |
Not Reported |
| Infrastructure Point of Contact Email |
Not Reported |
| Infrastructure Point of Contact Phone |
Not Reported |
| Infrastructure Point of Contact Address |
Not Reported |
| Infrastructure Point of Contact City |
Not Reported |
| Infrastructure Point of Contact State |
Not Reported |
| Infrastructure Point of Contact Zip |
Not Reported |
Product or Service Information
(Grants)
| Product or Service Information |
| Primary Activity Code |
U01 |
| Activity Description |
Science & Technology, General/Other |
| Sub-Awards Information |
| Sub-awards to Organizations |
0 |
| Sub-award Amounts to Organizations |
$0 |
| Sub-Awards to Individuals |
0 |
| Sub-Award Amounts to Individuals |
$0 |
| Number of Sub-awards less than $25,000/award |
0 |
| Amount of Sub-awards less than $25,000/award |
$0 |
| Number of payments to vendors greater than $25,000 |
0 |
| Total Amount of payments to vendors greater than $25,000/award |
$0 |
| Number of payments to vendors less than $25,000/award |
40 |
| Total Amount of payments to vendors less than $25,000/award |
$45,684 |
| Location Information |
| Latitude, Longitude |
38º 50' 6",
-77º 18' 38" |
| Congressional District |
11 |
| Address 1 |
4400 University Drive |
| Address 2 |
Research 1 |
| City |
Fairfax |
| County |
Fairfax |
| State |
VA |
| Zip |
22030-4444 |
|
 |